The filters ship like a collapsed accordian and are expanded into a plastic frame within the air cleaner cabinet. The filter is snapped into the plastic frame and held in place with existing pleat spacers. Assembly instructions are printed on the product carton.

The air cleaner media in the Model 2400 can last from 6 months up to 2 years. If installed on a 5-ton system, in the presence of high concentration of particulate, or if the furnace fan is on continuously, it may be necessary to change the media more frequently. In any application, the life of the media is dependant upon the total volume of air being moved through it as well as the amount of particulate it is filtering.

Comments about Original Aprilaire #401 Filter For 2400 Air Cleaner, 2-Pack:

The filters are a perfect fit. Since they are made by the manufacturer of my filtration unit, that comes as no surprise. Good quality and easy to install. I especially appreciated the installation instructions on the outside of the box. Since this was my first time changing the filter, it was a big help.

Comments about Original Aprilaire #401 Filter For 2400 Air Cleaner, 2-Pack:

The filters are a perfect fit. Since they are made by the manufacturer of my filtration unit, that comes as no surprise. Good quality and easy to install. I especially appreciated the installation instructions on the outside of the box. Since this was my first time changing the filter, it was a big help.